Ubuntu
initramfs-tools package

initramfs need to mount efivarfs because kernel 6.0 deprecated 'efivars' sysfs interface

Bug #1994936 reported by Cyrus Lien
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OEM Priority Project
Invalid
Critical
Cyrus Lien
initramfs-tools (Debian)
Fix Released
Unknown
initramfs-tools (Ubuntu)
New
Undecided
Unassigned

Bug Description

[ Impact ]

kernel 6.0 deprecated efivars sysfs interface [1]. For Intel VROC RAID, mdadm needs initramfs to mount efivarfs instead.

[1] The commit:
commit 0f5b2c69a4cbe4166ca24b76d5ada98ed2867741
Author: Ard Biesheuvel <email address hidden>
Date: Mon Jun 20 13:34:03 2022 +0200

    efi: vars: Remove deprecated 'efivars' sysfs interface

[ Test Plan ]

1. Install initramfs-tools
2. update-initramfs -u
3. unmkinitramfs initrd.img-`uname -r` /tmp/extract-initramfs
4. Check if boot script 00_mount_efivarfs exists in directory /tmp/extract-initramfs/main/scripts/init-top/
5. Check /tmp/extract-initramfs/main/scripts/init-top/ORDER if the boot script 00_mount_efivarfs will be execute before udev.

[ Where problems could occur ]

Not sure if there any other tools/utilities also need to mount efivarfs as early as mdadm but the probability of file conflict should be very low.
Also, there are no impact mounting efivarfs multiple times.
mount: /sys/firmware/efi/efivars: efivarfs already mounted on /sys/firmware/efi/efivars.

[ Scope ]

Jammy, Kinetic

[ Other Info ]

The private bug link https://bugs.launchpad.net/somerville/+bug/1990231

debian MR:
https://salsa.debian.org/kernel-team/initramfs-tools/-/merge_requests/66

Cyrus Lien (cyruslien)
Changed in oem-priority:
status: New → Confirmed
importance: Undecided → Critical
assignee: nobody → Cyrus Lien (cyruslien)
Bug Watch Updater (bug-watch-updater)
Changed in initramfs-tools (Debian):
status: Unknown → New
William Wilson (jawn-smith)
tags: added: foundations-todo
Revision history for this message
Rex Tsai (chihchun) wrote :

Canonical will need to carry this patch as a Ubuntu sauce for Jammy, in order to support Intel VMD in 22.04 (jammy) with linux-oem 6.0+ kernel.

Revision history for this message
Cyrus Lien (cyruslien) wrote :
Revision history for this message
Cyrus Lien (cyruslien) wrote :
Cyrus Lien (cyruslien)
Changed in oem-priority:
status: Confirmed → In Progress
Revision history for this message
Timo Aaltonen (tjaalton) wrote :

so this is not fixed in lunar yet?

and Debian seems to have fixed it in mdadm instead?

Revision history for this message
Cyrus Lien (cyruslien) wrote :

Tried Debian mdadm (4.2+20230223-1) it doesn't fix the issue and the only script mounting efivarfs is mdadm hook scrips.

Revision history for this message
Timo Aaltonen (tjaalton) wrote :

ok, but what about lunar?

Revision history for this message
Cyrus Lien (cyruslien) wrote :

Lunar also doesn't fix it yet. Do we need to send the patch to mdadm instead?

Revision history for this message
Cyrus Lien (cyruslien) wrote :
Bug Watch Updater (bug-watch-updater)
Changed in initramfs-tools (Debian):
status: New → Fix Released
Revision history for this message
Timo Aaltonen (tjaalton) wrote :

that debdiff does a lot more than just adds the script?

Revision history for this message
Cyrus Lien (cyruslien) wrote :

Due to lunar bumped shellcheck to version 0.9.0-1, a lot of shellcheck findings need to be fixed to prevent build failure.

Revision history for this message
Timo Aaltonen (tjaalton) wrote :

ok, but please mention it on the changelog too

Revision history for this message
Cyrus Lien (cyruslien) wrote :

According to https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1993541/comments/9, apply the patch to mdadm instead initramfs-tools.

Changed in oem-priority:
status: In Progress → Invalid
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